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The atomic number of an element is the number of protonsin its atom's nucleus. The mass number of an element is the number of nucleons (protons or neutrons) in its atom's nucleus. Except in the case of hydrogen, which has no neutrons, the mass number will always be higher.

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Q: Why is the mass number bigger than the atomic number?
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What is larger the atomic mass or the atomic number?

The Atomic Number of an element is the number of Protons in its nucleus, that is what determines what element the atom is. The Atomic Mass is the total mass of Protons, Neutrons, and (negligable) Electrons, but that means the Atomic Mass will be larger than the Atomic Number.


How atomic number better than atomic mass?

No two elements may have the same atomic number. But two elements may have same atomic mass. Hence atomic number is better than atomic mass.


Can the mass number of the atom ever be smaller than its atomic number?

No. The atomic number only counts the number of protons or electrons in an atom, but the mass number counts at least the number of protons, sometimes the electrons and the number of neutrons if any. The closest they will get is being the same (Hydrogen with AN=1, MN=1), but the mass number will almost always be bigger than the atomic number.


The atomic mass of iodine is less than the atomic mass?

The atomic mass of iodine is less than the atomic mass of all elements with greater atomic number.


Can the atomic mass be greater than the atomic number?

Yes


What is the atomic mass number of an isotope that has a atomic number of 6 but atomic mass of 5?

I think your understanding is confused. Atomic No. of '6' indicates the position in the periodic table, the number of protons, and the number of electrons. Atomic Mass is a number ( equal to or greater than atomic no.), which is the the total of protons and neutrons in the nucleus of an atom . So you atomic mass of '5' is incorrect as it is less than '6'. I think you mean 5 neutrons. If so the atomic mass is 6 + 5 = 11 This would be the isotopic element C-11 (Carbon eleven).


What element is one atomic number bigger than platinum?

Gold has one atomic number bigger than platinum which is 79.It is represented by Au.


Why atomic mass is always greater than atomic number?

Atomic number indicates the number of protons in the nucleus of a given element, whereas atomic mass results from protons and neutrons.


Is boron atomicly bigger or smaller than Oxygen?

Boron has a larger atomic radius but a smaller atomic mass.


What has a different mass number than the normal atom?

We can find atomic mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.


Why actual atomic mass is greater than mass number?

Mass number = number of protons + number of neutrons in an atom


What is the relationship between the atomic number and the atomic mass number?

Atomic number: number of protons in a nucleus unique to an element Atomic Mass number: number of protons + number of neutrons in a nucleus. May be a small range of values for a given element. Very roughly the atomic mass number is double the atomic number. For large elements it is more than double.